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Abstract: Principles and technology development of computer hard
disk drives ard briefly introduced. It is pointed out that the problems
of grease-lubricated ball bearings, which are used in the current hard
disk drive spindles in non-repeatable run-out , size, life time and noise
restricts the further improvement of hard disk drive. The advantages of
and challenges in fluid hydrodynamic bearings, including air, grease, ferrofluid
and oil bearings, which would replace ball bearings to support hard disk
drive spindles in the future, are discussed in detail.
Key words: Hard disk drive Ball bearing Hydrodynamic bearing
CLC No: TH117
国家自然科学基金资助项目(59905014).
Received 20010618, received in revised form 20011015
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